[RFC PATCH 0/4] UDP: implement GRO support for UDP_SEGMENT socket

[Paolo Abeni <pabeni@redhat.com>]

This series implements GRO support for UDP sockets, as the RX counterpart
of ommit bec1f6f69736 ("udp: generate gso with UDP_SEGMENT"). 
The first two patches allow UDP GRO registration on demand, avoiding additional
overhead when no UDP_SEGMENT sockets are created, actually decreasing the GRO
engine costs for the default configuration for UDP packets. They could possibly
live on their own.
The third patch contains the actual UDP GRO implementation, while the 4th patch
allows using the udpgso_bench_rx program under selftest to trigger UDP GRO. A
full self-test is not there yet.

Paolo Abeni (4):
  net: add new helper to update an already registered offload
  net: enable UDP gro on demand.
  udp: implement GRO plain UDP sockets.
  selftests: add GRO support, fix port option processing

 include/linux/udp.h                           |  18 +-
 include/net/addrconf.h                        |   1 +
 include/net/protocol.h                        |   4 +
 include/net/udp.h                             |  12 ++
 net/ipv4/protocol.c                           |  13 +-
 net/ipv4/udp.c                                |   3 +
 net/ipv4/udp_offload.c                        | 170 +++++++++++++++---
 net/ipv4/udp_tunnel.c                         |   1 +
 net/ipv6/af_inet6.c                           |   1 +
 net/ipv6/protocol.c                           |  13 +-
 net/ipv6/udp_offload.c                        |  31 +++-
 tools/testing/selftests/net/udpgso_bench_rx.c |  18 +-
 12 files changed, 244 insertions(+), 41 deletions(-)

-- 
2.17.1